Recent statistics released by the Central Narcotics Bureau show a clear trend - over 60 per cent of those caught with cannabis use are under 30. Some perceptions of cannabis among the young are hard to scrub out - that it's not as harmful as other drugs, celebrities use it, other countries legalise it and it is used for medical reasons. Steven Chia plays moderator as 27-year-old copywriter Kimberley Jeremiah puts the burning questions to Dr Melvyn Zhang, a consultant with the National Addictions Management Service at the Institute of Mental Health and Firdaus Daud, from the National Council Against Drug Abuse.

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